Offer65.不用加减乘除做加法/Solution.java
<filename>Offer65.不用加减乘除做加法/Solution.javaclass Solution {
    public int add(int a, int b) {
        if (b == 0) return a;
        // 非进位，进位
        return add(a ^ b, (a & b) << 1);
    }
}